Majestic L6-4.0L (1990)
Control Module: All Technical Service Bulletins
A/T - Poor Shift Quality
44-11
Transmission-Harsh Shift Introduction of Replacement Parts
MODEL
90-91 MY Sedans
DATE 5/91
ISSUE:
Customer complaints of poor shift quality during the 1-2, 3-4 upshift (at light throttle) and at 4th gear lock-up.
ACTION:
The following replacement parts have been introduced:
^
Valve body - EBC 4410
^
Transmission ECU - DBC 6162 (DBC 10110 from VIN 642173)
These parts will only repair harsh shift complaints on vehicles with the following transmission components:
^
A Transmission prior to gearbox serial # 42731.
^
Transmission ECU - DBC 5080
NOTE:
ECU DBC 10110 (or DBC 6162) must only be installed on transmissions with Serial number 42731 and onwards or if valve body EBC
4410 has been installed.
SERVICE ADVISOR NOTE: Determine the exact conditions of the complaint by road testing the vehicle with the customer.
On vehicles where a shift quality problem is identified, a request for replacement parts must be authorized by your Zone Service Hotline. The following
information is required:
^
VIN Number
^
Mileage
^
Customer's Name
^
Transmission Serial Number
^
Part Number of the Transmission ECU Installed
^
Fault Description
Where failure of the ECU or valve body has occurred, the specification of the replacement component supplied will be the same as or equivalent to the
original.
44-11
SERVICE ADVISOR NOTE:
On vehicles equipped with the latest components, an extended 1-2 shift at very light throttle and a slight
thump when 4th gear lock-up engages at engine speeds of 1900-2300 rpm may still occur.
These conditions are a characteristic of the specification.
PARTS INFORMATION:
Original Spec.
Current Spec.
Transmission Complete
EBC 3541
EBC 4409
(ser. # 42731 on)
Transmission Valve Body
EBC 3492
EBC 4410
(ser. # 42731 on)
Transmission ECU
DBC 5080
DBC 6328
(superseded to
(superseded to
DBC 6369)
DBC 6162)
DBC 10110
introduced
